sportomatic engine removal question

[carrera turbo]

Hey guys

I am removing the motor on our 75 sportomatic and was hoping not to remove the tranny as well. Im not sure if the torque converter simply slides off the splines or i need to un bolt anything to split the tranny from the engine. i have done several standard tranny Porsche's over the years but never a sporto.

thanks ed

[carrera turbo]

Hey guys

i took it out in one piece and got them split and preped for lots of cleaning.

ill post to my cosmetic restore thread later.

cheers ed

[Scott Douglas]

Ed
Timely post as I'm about to pull mine out to replace the servo. Your picture of the top of the trans helps a lot.
Question: Do you think you could've replaced the servo by only dropping the front of the trans/engine once you removed the shift shaft coupler? Is there enough room to do that?
Keep the pics coming as I'm stuck in analysis paralysis right now on how to tackle this job.
Thanks.

[Walter_Middie]

Ed,

Too bad you took them both out together. Now you'll miss the hours of screaming, yelling, and crying involved with trying to mate the engine and trans while you're under the car.

Seriously - it's not the taking out that is the issue - it's the putting them back in. I know some people that say it can be done, but I've never had any luck doing it.

[kidrock]

wow, that sporto trans is really something else...too cool. Congrats on the successful drop.

[carrera turbo]

Originally Posted by Scott Douglas

Ed
Timely post as I'm about to pull mine out to replace the servo. Your picture of the top of the trans helps a lot.
Question: Do you think you could've replaced the servo by only dropping the front of the trans/engine once you removed the shift shaft coupler? Is there enough room to do that?
Keep the pics coming as I'm stuck in analysis paralysis right now on how to tackle this job.
Thanks.

hey scott

it is pretty tight up under there, there just isnt the room you have with the 915 tranny. i will take some detailed pics of the tranny top and post them soyou can make up your mind which way you go.
cheers ed

Originally Posted by Walter_Middie

Ed,

Too bad you took them both out together. Now you'll miss the hours of screaming, yelling, and crying involved with trying to mate the engine and trans while you're under the car.

Seriously - it's not the taking out that is the issue - it's the putting them back in. I know some people that say it can be done, but I've never had any luck doing it.

walter
i have done several in the past with good luck but since have bought the jack adapter so life is much easier,plus now i can clean up everything well and most all the vacume lines where in bad shape and needing replaced

Originally Posted by kidrock

wow, that sporto trans is really something else...too cool. Congrats on the successful drop.

thanks the tranny is a bit odd looking from the top.

cheers ed

[carrera turbo]

scott

looks like there is only two bolts holding on the servo and the then one on the arm,could be a pita to get in there and then get it adjusted correctly. here are a few more pics.

cheers ed

[Scott Douglas]

Thanks for the pictures Ed.
I can see I'm probably going to be pulling the engine.
Not sure what my linkage looks like in the car, but my replacement servo looks like this picture.

I was/am surprised the actuation rod is so small in diameter on mine. I was expecting something more the size of yours.
I guess I'll just have to get it out and take a closer look.
Thanks again for the pics. If you find anything else you even THINK might be of interest shoot it and post it up.

[carrera turbo]

hey Scott

im not sure of the year of this servo but i can get the part number for it as the tranny was rebuilt about 12k miles ago. And i am lucky to have the service records back to the late 70s to date.

im thinking your best bet is to drop it out, theres a couple extra oil lines to deal with but other than that pretty straight forward..

ed

[crater64]

Scott, Ed:

Where did you all find replacement servos? I (knock wood) don't need one yet, but I've been trying to find replacement servo diaphragms to no avail. John Forcier (Fishcop) sent me a damaged one to show to possible vendors as an example, but nothing comes close yet. I bought one for a VW Autostick; it's perfect in its proportions but only about 75% as large as the Sporto version.

(my name is also) Ed

[Scott Douglas]

Ed-64
I'm not at liberty to say where I got my servo.
I wonder if the VW one will work.
Scott

[crater64]

No worries Scott, I'm not trying to raid anybody's stash.

I didn't buy a whole VW servo, just a diaphragm. Servo diaphragm repair kits are readily available for the VW crowd, e.g. via Automatic Stickshift Transaxle Parts: evwparts.

I'd be curious to know if any of their parts can interchange for any of the Sporto's parts. More interestingly, since the repair kits are aftermarket repros, I'd like to know who's making them, the costs involved and the ROI necessary for them to make some for the Sporto.

Ed

[Scott Douglas]

Just posting a picture for future ref.

This is a partial dis-assembly of a control valve.

[carrera turbo]

nice scott

im having a hard engagement into gear and have tried adjusting it out but if i make it shift into gear while stopped smoothly it seams to shift sluggish at speed if this makes sense. im gona replace all vacuum lines and clean up the wiring while im there, just wondering how yours engages from a stop to a drive gear.

cheers ed

[Scott Douglas]

Well Ed, when it was working it would go into gear similar to an American car automatic that had a 'built' trannie, if you know what I mean. You'd engage the gear, take your hand off the shift knob and you'd feel the torque converter load up. With your foot firmly on the brake the rearend of the car would squat slightly. My idle was/is set at @1100-1200 rpm out of gear but is a nice even 900 when 'in' gear. There was nothing sluggish about it going into gear at speed when everything was adjusted correctly.
This past Saturday I, along with a couple of friends of mine, did some 'experimenting' to check out the diaphragm, just to make sure it really was the problem. It is. Won't hold a vacuum. We then investigated the possibility of lowering the trans to get the servo out but that won't work as you need to move the trans back 3-4 inches to clear the tunnel. So, I'm looking at an engine drop to get the whole dang shootin' match out of the car.
I'm now trying to figure out how to get the car high enough to get the engine out without removing the bumper etc from the car.
More to come.
-I have more pics of the control valve if you need them. Let me know and I'll post 'em.

[Scott Douglas]

Hey, Both Ed's
I posted this yesterday in another thread:
I just checked my 'new' old servo yesterday but didn't take any pics of the setup.
I found an old bike inner tube (I never throw anything away according to my wife) that fit the fitting on the servo perfectly. Found an old valve stem from a wheel and put it in the end of the inner tube. I then used a very small bike tire pump I bought at PEP Boys yesterday morning just for this job. It worked perfectly as it doesn't take much volume of air at all to move the diaphragm. In fact, you can suck/blow on the fitting of the servo and make it move. With the valve stem in place I was able to pump air in and leave it to check it over time. Hard to do with your tongue unless you like walking around with servo hanging out of your mouth.
I would not recommend using anything but a small hand pump on the servo though. I was thinking about using my B&D air station on it but now realize that probably would've blown up the diaphragm.

Based on some calc's we made the Porsche servo develops @500 lbs of force based on a 7" diameter. I'd do some quick calc's on the VW servo Ed-64 has as it may have enough umph to work.

[carrera turbo]

scott

i have a vacume line on the bottom of my cis that i cant remember where it goes. it comes straight out the bottom of the cis unit and the hose is two short to reach anywhere that i can see.

if you know of a diagram for my 75 id love to see it.

cheers ed

[crater64]

Originally Posted by Scott Douglas

Hey, Both Ed's

Based on some calc's we made the Porsche servo develops @500 lbs of force based on a 7" diameter. I'd do some quick calc's on the VW servo Ed-64 has as it may have enough umph to work.

I only have a VW servo diaphragm, not a complete servo. It might be worth tracking one down and testing it as you describe, even one that needs rebuilding since I now have the diaphragm.

Ed

[Scott Douglas]

Ed-Alaska, I don't have a diagram of a '75. Can you take a picture of it? I do have a friend with a '75 2.7 that he took out of his Carrera that I could get a look at or ask him where it goes/went.

Ed64 - Yes, I agree, it would be worth finding one to rebuild with the diaphragm you have. I can't believe it takes THAT much pressure to operate the clutch with the mechanical advantage the levers give it.

My car is still waiting for me to get going on fixing it. =:>(